AD/BAe 146/27 Amdt 1 - Passenger and Service Door Mechanism

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, address a range of issues related to civil aviation safety, including the implementation of Airworthiness Directives (ADs) to ensure that aircraft meet safety standards. One such AD is AD/BAe 146/27, which pertains specifically to the British Aerospace BAe 146 Series aeroplanes. This AD was introduced to address a safety issue identified with the passenger and service door mechanisms on certain models of the BAe 146 aeroplanes, where high outward force during the door opening sequence could hinder the retraction of the side baulk blade, potentially impeding emergency evacuation. The policy objective of the AD is to mandate modifications that ensure the door mechanisms function correctly and safely under all conditions. The Civil Aviation Safety Authority is responsible for enforcing these regulations to maintain the highest standards of aviation safety in Australia. The specific AD/BAe 146/27 Amendment 1 mandates that aircraft models H, J, K, and L, as specified in BAe Mandatory Service Bulletin 52-89-00668 Revision 2, must be modified to rectify a dimension error found in the initial modifications introduced to address the safety issue. This amendment extends the compliance date by three months as directed by the UK Civil Aviation Authority, allowing operators additional time to implement the required changes. The directive ensures that the BAe 146 aeroplanes remain compliant with safety standards, thereby protecting passengers and crew during flights.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to airworthiness directives issued by the Civil Aviation Safety Authority (CASA) for ensuring the safety of aircraft within Australia's jurisdiction. One such directive, AD/BAe 146/27 Amendment 1, focuses on the passenger and service door mechanism of British Aerospace BAe 146 Series Aeroplanes. This directive applies to specific models and constructors numbers as outlined in BAe Mandatory Service Bulletin 52-89-00668H, J, K & L Revision 2, which includes models H, J, K, and L. The regulation mandates compliance with the actions specified in the service bulletin to address issues such as high outward force on the door during the opening sequence, which may hinder the retraction of the side baulk blade, thereby potentially impeding emergency evacuation. The directive also notes an extension of the compliance date by three months, as mandated by the UK Civil Aviation Authority. This regulation applies to aircraft operators and maintenance entities within the Commonwealth of Australia, ensuring the safety and compliance of BAe 146 Series Aeroplanes with the prescribed modifications to prevent potential safety hazards.

Key Provisions

The Civil Aviation Regulations 1998 (the Regulations) establish the legal framework for aviation safety in Australia, with specific provisions under Part 39 concerning airworthiness directives. Within this section, Part 39 - 105 (section 105) provides for the Civil Aviation Safety Authority (CASA) to issue airworthiness directives, ensuring aircraft meet safety standards. For British Aerospace BAe 146 series aeroplanes, a specific airworthiness directive (AD/BAe 146/27 Amendment 1) pertains to the passenger and service door mechanism (section 105.102). This directive, applicable to models and constructors numbers H, J, K, and L as specified in BAe Mandatory Service Bulletin (SB) 52-89-00668, requires compliance with the modifications outlined in the bulletin. Entities governed by these regulations, such as aircraft operators and maintenance service providers, must adhere to the requirements of AD/BAe 146/27 Amendment 1. This includes performing the necessary modifications to the door mechanism as detailed in BAe SB 52-89-00668 Revision 2, which may involve replacing or adjusting components to correct a dimension error identified in previously modified aircraft. Compliance with these directives is mandatory, and any non-compliance can lead to severe safety risks, particularly during emergency evacuations. Operators must ensure that all modifications are completed prior to the compliance date, which has been extended by three months to allow for necessary adjustments. Failure to comply with the airworthiness directives can result in significant consequences. Under the Civil Aviation Act 1988, non-compliance with airworthiness directives can be considered an offence, leading to potential civil penalties (section 38). The specific penalties for breaching these directives can include fines, with the exact amount determined by the severity of the breach and the regulatory discretion of CASA. Additionally, persistent or severe non-compliance can result in criminal charges, potentially leading to imprisonment. The safety of passengers and crew depends on strict adherence to these regulations, and the penalties underscore the importance of timely and accurate compliance.